Next Article in Journal
Electric Polarization in Magnetic Topological Nodal Semimetal Thin Films
Previous Article in Journal
Surface Excitations, Shape Deformation, and the Long-Time Behavior in a Stirred Bose–Einstein Condensate
Previous Article in Special Issue
Negative Energy Antiferromagnetic Instantons Forming Cooper-Pairing ‘Glue’ and ‘Hidden Order’ in High-Tc Cuprates
Article Menu

Export Article

Open AccessArticle
Condens. Matter 2018, 3(4), 42; https://doi.org/10.3390/condmat3040042

The Magnetic Properties of 1111-type Diluted Magnetic Semiconductor (La1−xBax)(Zn1−xMnx)AsO in the Low Doping Regime

1
Department of Physics, Zhejiang University, Hangzhou 310027, China
2
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
*
Author to whom correspondence should be addressed.
Received: 14 September 2018 / Revised: 15 November 2018 / Accepted: 26 November 2018 / Published: 29 November 2018
(This article belongs to the Special Issue Selected Papers from Quantum Complex Matter 2018)
Full-Text   |   PDF [1017 KB, uploaded 29 November 2018]   |  

Abstract

We investigated the magnetic properties of (La 1 x Ba x )(Zn 1 x Mn x )AsO with x varying from 0.005 to 0.05 at an external magnetic field of 1000 Oe. For doping levels of x ≤ 0.01, the system remains paramagnetic down to the lowest measurable temperature of 2 K. Only when the doping level increases to x = 0.02 does the ferromagnetic ordering appear. Our analysis indicates that antiferromagnetic exchange interactions dominate for x ≤ 0.01, as shown by the negative Weiss temperature fitted from the magnetization data. The Weiss temperature becomes positive, i.e., ferromagnetic coupling starts to dominate, for x ≥ 0.02. The Mn-Mn spin interaction parameter 2 J / k B is estimated to be in the order of 10 K for both x ≤ 0.01 (antiferromagnetic ordered state) and x ≥ 0.02 (ferromagnetic ordered state). Our results unequivocally demonstrate the competition between ferromagnetic and antiferromagnetic exchange interactions in carrier-mediated ferromagnetic systems. View Full-Text
Keywords: ferromagnetic ordering; antiferromagnetic exchange interaction; ferromagnetic coupling; carrier-mediated ferromagnetic ordering; antiferromagnetic exchange interaction; ferromagnetic coupling; carrier-mediated
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Zhi, G.; Wang, K.; Zhang, H.; Ding, C.; Guo, S.; Gu, Y.; Fu, L.; Ning, F.L. The Magnetic Properties of 1111-type Diluted Magnetic Semiconductor (La1−xBax)(Zn1−xMnx)AsO in the Low Doping Regime. Condens. Matter 2018, 3, 42.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Condens. Matter EISSN 2410-3896 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top